Answer:(b) an easement by prescription.
Explanation:Easement by prescription
refers to a right of using someone's land for a certain purpose which is according to a period set by statute. This is based on the state law which is different for each state, which determines the period which one can have a prescriptive easement. For example if someone needs to constantly pass through a land owned by another person to get to their own land ,they may do that without the owner's consent.